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Conjugated-insulating block copolymers

Copolymerization of substituted and unsubstituted monomers was also investigated [74]. The density of side-chains along the PPP backbone was slowly decreased by varying the ratio of substituted to non-substituted monomers in the reaction mixture. Copolymers exhibit statistically distributed repeating units no evidence for alternation or for block-sequences was found. Their was a marked effect on the UV spectra, indicative of a modification in the extent of conjugation between adjacent benzene rings induced by side-chains. This effect is linked to steric hindrance and it shows that a disubstituted benzene unit acts as an electronic insulator between unsubstituted blocks of PPP. DPs of 50 are reported for these copolymers. [Pg.221]

See other pages where Conjugated-insulating block copolymers is mentioned: [Pg.299]    [Pg.300]    [Pg.299]    [Pg.300]    [Pg.418]    [Pg.212]    [Pg.302]    [Pg.308]    [Pg.315]    [Pg.319]    [Pg.320]    [Pg.322]    [Pg.92]    [Pg.540]    [Pg.145]    [Pg.670]    [Pg.254]    [Pg.69]   
See also in sourсe #XX -- [ Pg.322 ]



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Conjugated block copolymers

Copolymers conjugated

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